# [1] z, [2] chi(z) (Mpc/h)
0.000000000000000000e+00 0.000000000000000000e+00
1.000000000000000000e+00 2.256881609485611989e+03
2.000000000000000000e+00 3.533010027093416284e+03
3.000000000000000000e+00 4.341010738114349806e+03
4.000000000000000000e+00 4.904492771109615205e+03
5.000000000000000000e+00 5.324542505411079219e+03
